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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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锰改性活性焦脱除合成气中单质汞的影响因素
, PP. 1324-1331
Keywords: 汞,锰改性,活性焦,脱汞效率,合成气,mn-ac
Abstract:
？采用等体积浸渍法制备了mn改性活性焦吸附剂(mn-ac),研究了模拟合成气(0.04%h2s、20%co、30%h2、n2为平衡气体)下mn-ac对单质汞的吸附特性,并利用bet、xps、xrd等手段对吸附剂进行表征,分析了还原性气体对吸附剂脱汞性能的影响.结果表明,在模拟合成气气氛下,mn-ac具有优异的汞脱除能力,200℃下2h内平均汞脱除率达到84.3%.合成气中,h2s提供了具有脱汞能力的活性硫吸附位(sad),显著地提高了mn-ac的高温脱汞能力;h2消耗了吸附剂表面的活性氧,不利于活性硫的生成,co消耗了生成的活性硫吸附位,两者对汞脱除均有抑制作用.高温下由于活性硫和汞的反应减弱,同时h2的抑制作用加强,吸附剂对单质汞的脱除能力下降.
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